-LRB- CNN -RRB- Airport and paradise are two words destined never to sit next to each other in the same sentence , but looking at the plans for Singapore 's new airport that could soon change .

Construction on the city state 's new structure for Changi Airport , the Jewel Changi , is underway .

Images of how the project looks when it 's finished

show impressive steel-and-glass biosphere-style structures filled with plants and a gigantic waterfall .

Scheduled for completion in 2018 , if all goes according to plan , Project Jewel is likely to cement Changi 's reputation who is recently named SkyTrax World 's Best Airport for the third consecutive year .

The massive donut-like structure at its core will be 10 stories -- five above ground and five underground -- integrating airport facilities , with retail and leisure outlets .

There 'll also be playgrounds and a hotel .

More than simply a new terminal , Jewel Changi Airport will be constructed on the site of the old parking lot fronting the existing Changi Airport 's Terminal 1 , and will be `` seamlessly connected '' to the existing terminals , according to the airport .

Maintaining Singapore 's reputation as the `` garden city , '' Jewel Changi 's centerpiece will be Forest Valley , a five-story garden with thousands of trees , ferns and shrubs .

Commuters will even be able to take a hike up the valley . `` We wanted to create a space where activities that were traditionally outdoors in nature are brought to an indoor environment , '' Robin Goh , Changi Airport Group spokesperson , tells CNN .

Cascading through Jewel 's donut hole , in the middle of the forest , will be the 40-meter-high Rain Vortex .

On completion , it 'll be the world 's tallest indoor waterfall , according to the airport .

At night , the Rain Vortex will transform into a light and sound show .

Four different gateway gardens will feature unique landscape elements .

The North Gateway Garden , for instance , will use the trunks of rain trees recycled from the airport 's old open-air parking lot .

On the top level , Canopy Park will have gardens , walking trails , playgrounds and eateries spanning approximately 13,000 square meters .

`` We envisaged an area that comes with big sprawling spaces and play activities , '' says Goh of Canopy Park .

`` We wanted to create a place where visitors can simply relax and have fun with their families and friends . ''

Travelers will be able to stay at Jewel 's own hotel -- approximately 130 rooms operated by international hotel brand YOTEL .

The complex will house an `` integrated multi-modal transport lounge . ''

That means ticketing , boarding pass and baggage transfer service will be available for passengers .

Early check-in facilities at the complex will allow passengers to check-in and drop off luggage ahead of regular check-in times .

There 'll also be new subway links connecting all the airports terminals to the MRT network .

A winner of multiple best airport awards over the years , Changi served 54.1 million passengers in 2014 .

The airport expects a new Terminal 4 opening in 2017 for Cathay Pacific and Jewel in 2018 to bring 85 million passengers a year .

`` In order for Changi Airport to stay ahead amidst intensifying competition from other airports , it 's important for continuous innovation to be introduced , '' says Goh .

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Jewel Changi Airport in Singapore is expected to be completed by the end of 2018

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The massive donut-like structure will be 10 stories , five above ground and five underground

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Its 40-meter-high Rain Vortex will be the world 's tallest indoor waterfall